This converter features contemporary units of capacity. There is also a special converter for historical units of volume you might want to visit for ancient, medieval and other old units that are no longer used.

U.S. Dry Measure

Apothecaries

The traditional English apothecaries' system defines weights, not volumes. However, there was apothecaries' system for volumes too, though less commonly used. Before introduction of the imperial units, all apothecaries' measures were based on the wine gallon which later became the base of U.S. liquid gallon.

In addition to five official apothecaries' units pint, fliud ounce, fluid dram, fluid scruple, and minim, there was a set of unofficial but widely used units for various spoon and glass sizes. We list them here too.

In 1858 apothercaries' system was officially abolished in in the U.K. in favour of the standard Avoirdupois system. In the United States the apothecaries' system remained in use until 1971, when it was officially abolished in favor of the metric system.

English brewery cask units

Historically the terms beer and ale referred to distinct brews. From the mid 15th century until 1803 in Britain "ale" casks and "beer" casks differed in the number of gallons they contained. We provide conversions for the latest standard (1824) of units that are based on imperial gallons.

Cooking (International)

Cooking (Australian)

Natural units

In physics, natural units are physical units of measurement based only on universal physical constants. The origin of their definition comes only from properties of nature and not from any human construct.

Astronomical

Ship tonnage measurements

Register ton unit was defined by the Moorsom Commission (Great Britain) in 1854 to measure ship internal volume. It was officially replaced by tonnage when the International Maritime Organization (IMO) adopted The International Convention on Tonnage Measurement of Ships on 23 June 1969. Since 18 July 1994 the gross and net tonnages are the only official measures used for the ships.

Lumber measure

These units are sometimes used to measure the volume of lumber in Great Britain, the United States, Canada, Australia and New Zealand. The same units is called board-foot in the U.S. and Canada and super foot or superficial foot in Australia and New Zealand. One board-foot is the volume of a one-foot length of a board one foot wide and one inch thick.

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